Miami Dolphins QB Ryan Tannehill (knee) is undergoing reconstructive knee surgery Thursday, Aug. 17, according to sources. A full recovery is expected to take between 10 and 12 months. At that rate, Tannehill would at least be ready for training camp next offseason.

Fantasy Tip: Tannehill can be avoided for the foreseeable future. It remains to be seen if he will even be playing for the Dolphins next year. For now, Jay Cutler and Matt Moore will take the quarterback reins in Miami, but both are low-end fantasy backups.

Fantasy Tip: Tannehill will be sidelined for the entire 2017 season and his future with the Dolphins is uncertain. Jay Cutler will be the starting quarterback for Miami in 2017 and could be a No. 2 fantasy quarterback in leagues.

Fantasy Tip: Jay Cutler will be the starter for the Dolphins this season and has had success under head coach Adam Gase. He will have a very good receiving corps to work with and could be a No. 2 fantasy quarterback. Tannehill will not be back until 2018 and has a uncertain future with the Dolphins.

Miami Dolphins QB Ryan Tannehill (knee) has a partially torn anterior cruciate ligament in his left knee, but it is not known if he will undergo surgery. Tannehill suffered a similar injury last season and decided not to undergo surgery.

Fantasy Tip: Tannehill will significant amount of time if he does not undergo surgery and will miss the entire 2017 season if he does undergo surgery. He should be avoided in all fantasy leagues. Jay Cutler will be the starting quarterback for the Dolphins and will have a solid group of pass catchers to work with. Cutler can be a No. 2 quarterback for fantasy owners.

Updating previous reports, the Miami Dolphins are now worried that QB Ryan Tannehill (knee) undergoing season-ending knee surgery is the most likely and viable scenario, according to sources. No decision has been made, however, and both Tannehill and the team are expected to receive additional opinions and sort through their options, which include Tannehill resting the knee for six to eight weeks and then attempting to return. The Dolphins will take at least "several days" to make the decision, according to ESPN's Jeff Darlington.

Fantasy Tip: The news just keeps getting worse for Tannehill and the Dolphins as it now appears the absolute best-case scenario is six weeks of rest followed by another attempt to make it through the season on a bum knee that one source labeled a "ticking time bomb." The potential fallout would make Vault Boy's head spin: under center, would they go with Matt Moore or reach out to Jay Cutler or Colin Kaepernick? On the outside, how would those respective replacements affect Jarvis Landry, DeVante Parker and Kenny Stills? It's a bad situation, and until we have resolution it'd be prudent to avoid Tannehill and at least downgrade Parker and Stills.

Miami Dolphins QB Ryan Tannehill (knee) will seek a second opinion on his injured left knee, according to a source. It was reported earlier that Tannehill does not have structural damage, but he wants to be sure.

Fantasy Tip: Panic mode seems to have been avoided, but Tannehill's status will need to be monitored in the coming days and weeks. Again, though, he is merely a QB2 even when he's at full health.

Updating a previous report, Miami Dolphins QB Ryan Tannehill (knee) has no structural damage in his injured knee, according to a source. His knee did buckle, but it is in the same condition as it was before he went down in practice. Tannehill may still miss some time, but a timetable has not been disclosed.

Fantasy Tip: Keep tabs on updates regarding Tannehill's injury, but it's promising so far. Tannehill injured the same leg/knee he injured last year, so the Dolphins will assuredly take it easy with him going forward. When fully healthy, Tannehill is a serviceable backup fantasy quarterback.

Updating an earlier report, Miami Dolphins QB Ryan Tannehill (knee) left practice Thursday, Aug. 3, due to a left knee injury, and the team is concerned about his status, according to a league source.

Fantasy Tip: It's important to note that his already injured left knee is the area of concern. Tannehill severely sprained the ACL and MCL last season but didn't require surgery. It's too early to speculate, but the amount of upside he had as a QB2 in fantasy appears gone for now.